Buff Athenes Unholy Grail

Ive always liked this item, which allows supports without heals to heal their allies. However, most supports dont get it in favor of because the stats are too measley. Only 40 AP and 30 MR? I know its a very cheap item, but it feels pretty bad to buy. Plus the harmony passive doesnt really feel impactful, granting % hp regen for an item meant on AP supports. So heres my suggestion on how to change it.

Recipe : + + + 400G = 2500g total cost

+60 AP +40 MR +75% mana regen +20% CDR

UNIQUE: Gain 10% of the premitigation damage dealt (25% against champions and epic monsters) as Blood Charges, up to 130 - 300 (based on level). Healing or shielding another ally consumes charges to heal them 80% and yourself 20% of the original effect amount.